Which Altitude Reference is Used by Gpredict?

[AlexLandherr]

I'm wondering which altitude value for the ground station location I should enter?

I've taken my glossary of terms from here:
Elevation for beginners

Elevation types:

1. Ellipsoidal Height
2. Geoid Height
3. Orthometric Height

I've tried looking at the user manual but found nothing definitive.

[mdblack98]

I would think ellipsoidal as that's what satellites use https://gssc.esa.int/navipedia/index.php/Reference_Frames_in_GNSS On Wednesday, January 17, 2024 at 07:19:15 AM CST, Alex Landherr ***@***.***> wrote: I'm wondering which altitude value for the ground station location I should enter? I've taken my glossary of terms from here: Elevation for beginners Elevation types: - Ellipsoidal Height - Geoid Height - Orthometric Height I've tried looking at the user manual but found nothing definitive. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[AlexLandherr]

Thanks! Was just curious about it since my future ground station needs accurate position data.

[wkitty42]

i've only ever used the standard ASL (Above Sea Level) like seen on most digital map apps and devices that have GPS capabilities... it will get you close enough... just be sure to use the proper unit measure for the software 😉
eg: 280ft ASL is 85.34meters ASL... round as needed...